635 g/kg to PSU

635 g/kg = 638.111 PSU

g/kgPSU
620 g/kg623.038
625 g/kg628.062
630 g/kg633.087
635638.111
640 g/kg643.136
645 g/kg648.16
650 g/kg653.185

635 g/kg = 638.111 PSU

Formula

1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)